36 hours cold Watertight zipper and welded seams ensure leak proof transport Durable 600D polyester shell is ultra-light and waterproof TRU® Zip zipper is waterproof, dust-proof, toothless, with a smooth and secure pull-to-close design Removable cross-body strap and shoulder straps provide multiple carry options FDA food grade, BPA free-liner Laser cut welded gear attachment loops Woven loops easily attach our Dry Storage accessory Note: TRU® Zip zipper is engineered to be silent, requires less pulling force, and is self-healing. Should the zipper separate for any reason, simply slide the zipper to realign. Hydro Flask 18 L Day Escape Soft Cooler Tote